package com.yexin.mail.product.service.impl;

import com.yexin.mail.product.entity.AttrGroupEntity;
import com.yexin.mail.product.service.CategoryBrandRelationService;
import javafx.scene.chart.CategoryAxis;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yexin.common.utils.PageUtils;
import com.yexin.common.utils.Query;

import com.yexin.mail.product.dao.CategoryDao;
import com.yexin.mail.product.entity.CategoryEntity;
import com.yexin.mail.product.service.CategoryService;
import org.springframework.transaction.annotation.Transactional;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {


    @Autowired
    CategoryBrandRelationService categoryBrandRelationService;


    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {
        //查处所有分类  组装成父子树形结构
        List<CategoryEntity> entities = baseMapper.selectList(null);
        //查出所有分类
        //找到所有的以及分类
        List<CategoryEntity> level1Menus = entities.stream().filter(categoryEntity ->
                categoryEntity.getParentCid() == 0
        ).map((menu)->{
            menu.setChildren(getChildren(menu,entities));
            return menu;
        }).sorted((menu1,menu2)->{
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());

        return level1Menus;
    }

    @Override
    public void removeByMenuIds(List<Long> asList) {
        //Todo 检查当前删除的菜单 是否被别的地方引用

        //逻辑删除，使用字段表示标识位
        baseMapper.deleteBatchIds(asList);
    }


    //递归查找所有菜单和子菜单
    private List<CategoryEntity> getChildren(CategoryEntity root ,List<CategoryEntity> all)
    {
        List<CategoryEntity> children = all.stream().filter(categoryEntity -> {
            return categoryEntity.getParentCid().equals(root.getCatId());
        }).map(categoryEntity -> {
            //找到子菜单
            categoryEntity.setChildren(getChildren(categoryEntity, all));
            return categoryEntity;
        }).sorted((menu1, menu2) -> {
            //菜单的排序
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());
        return children;

    }

    @Override
    public Long[] findCatelogpath(Long attrGroupId) {
        List<Long> paths = new ArrayList<>();
        List<Long> parentPath = findParentPath(attrGroupId, paths);
        Collections.reverse(parentPath);

        return parentPath.toArray(new Long[parentPath.size()]);
    }

    /**
     * 及联更新
     * @param category
     */
    @Transactional
    @Override
    public void updateCascade(CategoryEntity category) {
        this.updateById(category);
        if(!StringUtils.isEmpty(category.getName())) {
            categoryBrandRelationService.updateCategory(category.getCatId(),category.getName());
        }

    }

    private  List<Long> findParentPath(Long attrGroupId,List<Long> paths){
//        save now node
        paths.add(attrGroupId);
        CategoryEntity byId = this.getById(attrGroupId);
        if(byId.getParentCid()!=0){
            findParentPath(byId.getParentCid(), paths);
        }
        return paths;
    }

}